fs/nfs/nfs3proc.c

   1 /*
   2  *  linux/fs/nfs/nfs3proc.c
   3  *
   4  *  Client-side NFSv3 procedures stubs.
   5  *
   6  *  Copyright (C) 1997, Olaf Kirch
   7  */
   8
   9 #include <linux/mm.h>
  10 #include <linux/utsname.h>
  11 #include <linux/errno.h>
  12 #include <linux/string.h>
  13 #include <linux/sunrpc/clnt.h>
  14 #include <linux/nfs.h>
  15 #include <linux/nfs3.h>
  16 #include <linux/nfs_fs.h>
  17 #include <linux/nfs_page.h>
  18 #include <linux/lockd/bind.h>
  19 #include <linux/nfs_mount.h>
  20
  21 #include "iostat.h"
  22 #include "internal.h"
  23
  24 #define NFSDBG_FACILITY         NFSDBG_PROC
  25
  26 /* A wrapper to handle the EJUKEBOX error message */
  27 static int
  28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  29 {
  30         int res;
  31         do {
  32                 res = rpc_call_sync(clnt, msg, flags);
  33                 if (res != -EJUKEBOX)
  34                         break;
  35                 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
  36                 res = -ERESTARTSYS;
  37         } while (!fatal_signal_pending(current));
  38         return res;
  39 }
  40
  41 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  42
  43 static int
  44 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  45 {
  46         if (task->tk_status != -EJUKEBOX)
  47                 return 0;
  48         nfs_inc_stats(inode, NFSIOS_DELAY);
  49         task->tk_status = 0;
  50         rpc_restart_call(task);
  51         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  52         return 1;
  53 }
  54
  55 static int
  56 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  57                  struct nfs_fsinfo *info)
  58 {
  59         struct rpc_message msg = {
  60                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  61                 .rpc_argp       = fhandle,
  62                 .rpc_resp       = info,
  63         };
  64         int     status;
  65
  66         dprintk("%s: call  fsinfo\n", __func__);
  67         nfs_fattr_init(info->fattr);
  68         status = rpc_call_sync(client, &msg, 0);
  69         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  70         if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  71                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  72                 msg.rpc_resp = info->fattr;
  73                 status = rpc_call_sync(client, &msg, 0);
  74                 dprintk("%s: reply getattr: %d\n", __func__, status);
  75         }
  76         return status;
  77 }
  78
  79 /*
  80  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  81  */
  82 static int
  83 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  84                    struct nfs_fsinfo *info)
  85 {
  86         int     status;
  87
  88         status = do_proc_get_root(server->client, fhandle, info);
  89         if (status && server->nfs_client->cl_rpcclient != server->client)
  90                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  91         return status;
  92 }
  93
  94 /*
  95  * One function for each procedure in the NFS protocol.
  96  */
  97 static int
  98 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
  99                 struct nfs_fattr *fattr)
 100 {
 101         struct rpc_message msg = {
 102                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 103                 .rpc_argp       = fhandle,
 104                 .rpc_resp       = fattr,
 105         };
 106         int     status;
 107
 108         dprintk("NFS call  getattr\n");
 109         nfs_fattr_init(fattr);
 110         status = rpc_call_sync(server->client, &msg, 0);
 111         dprintk("NFS reply getattr: %d\n", status);
 112         return status;
 113 }
 114
 115 static int
 116 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 117                         struct iattr *sattr)
 118 {
 119         struct inode *inode = dentry->d_inode;
 120         struct nfs3_sattrargs   arg = {
 121                 .fh             = NFS_FH(inode),
 122                 .sattr          = sattr,
 123         };
 124         struct rpc_message msg = {
 125                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 126                 .rpc_argp       = &arg,
 127                 .rpc_resp       = fattr,
 128         };
 129         int     status;
 130
 131         dprintk("NFS call  setattr\n");
 132         nfs_fattr_init(fattr);
 133         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 134         if (status == 0)
 135                 nfs_setattr_update_inode(inode, sattr);
 136         dprintk("NFS reply setattr: %d\n", status);
 137         return status;
 138 }
 139
 140 static int
 141 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 142                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 143 {
 144         struct nfs_fattr        dir_attr;
 145         struct nfs3_diropargs   arg = {
 146                 .fh             = NFS_FH(dir),
 147                 .name           = name->name,
 148                 .len            = name->len
 149         };
 150         struct nfs3_diropres    res = {
 151                 .dir_attr       = &dir_attr,
 152                 .fh             = fhandle,
 153                 .fattr          = fattr
 154         };
 155         struct rpc_message msg = {
 156                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 157                 .rpc_argp       = &arg,
 158                 .rpc_resp       = &res,
 159         };
 160         int                     status;
 161
 162         dprintk("NFS call  lookup %s\n", name->name);
 163         nfs_fattr_init(&dir_attr);
 164         nfs_fattr_init(fattr);
 165         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 166         nfs_refresh_inode(dir, &dir_attr);
 167         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 168                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 169                 msg.rpc_argp = fhandle;
 170                 msg.rpc_resp = fattr;
 171                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 172         }
 173         dprintk("NFS reply lookup: %d\n", status);
 174         return status;
 175 }
 176
 177 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 178 {
 179         struct nfs_fattr        fattr;
 180         struct nfs3_accessargs  arg = {
 181                 .fh             = NFS_FH(inode),
 182         };
 183         struct nfs3_accessres   res = {
 184                 .fattr          = &fattr,
 185         };
 186         struct rpc_message msg = {
 187                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 188                 .rpc_argp       = &arg,
 189                 .rpc_resp       = &res,
 190                 .rpc_cred       = entry->cred,
 191         };
 192         int mode = entry->mask;
 193         int status;
 194
 195         dprintk("NFS call  access\n");
 196
 197         if (mode & MAY_READ)
 198                 arg.access |= NFS3_ACCESS_READ;
 199         if (S_ISDIR(inode->i_mode)) {
 200                 if (mode & MAY_WRITE)
 201                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 202                 if (mode & MAY_EXEC)
 203                         arg.access |= NFS3_ACCESS_LOOKUP;
 204         } else {
 205                 if (mode & MAY_WRITE)
 206                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 207                 if (mode & MAY_EXEC)
 208                         arg.access |= NFS3_ACCESS_EXECUTE;
 209         }
 210         nfs_fattr_init(&fattr);
 211         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 212         nfs_refresh_inode(inode, &fattr);
 213         if (status == 0) {
 214                 entry->mask = 0;
 215                 if (res.access & NFS3_ACCESS_READ)
 216                         entry->mask |= MAY_READ;
 217                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 218                         entry->mask |= MAY_WRITE;
 219                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 220                         entry->mask |= MAY_EXEC;
 221         }
 222         dprintk("NFS reply access: %d\n", status);
 223         return status;
 224 }
 225
 226 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 227                 unsigned int pgbase, unsigned int pglen)
 228 {
 229         struct nfs_fattr        fattr;
 230         struct nfs3_readlinkargs args = {
 231                 .fh             = NFS_FH(inode),
 232                 .pgbase         = pgbase,
 233                 .pglen          = pglen,
 234                 .pages          = &page
 235         };
 236         struct rpc_message msg = {
 237                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 238                 .rpc_argp       = &args,
 239                 .rpc_resp       = &fattr,
 240         };
 241         int                     status;
 242
 243         dprintk("NFS call  readlink\n");
 244         nfs_fattr_init(&fattr);
 245         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 246         nfs_refresh_inode(inode, &fattr);
 247         dprintk("NFS reply readlink: %d\n", status);
 248         return status;
 249 }
 250
 251 struct nfs3_createdata {
 252         struct rpc_message msg;
 253         union {
 254                 struct nfs3_createargs create;
 255                 struct nfs3_mkdirargs mkdir;
 256                 struct nfs3_symlinkargs symlink;
 257                 struct nfs3_mknodargs mknod;
 258         } arg;
 259         struct nfs3_diropres res;
 260         struct nfs_fh fh;
 261         struct nfs_fattr fattr;
 262         struct nfs_fattr dir_attr;
 263 };
 264
 265 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 266 {
 267         struct nfs3_createdata *data;
 268
 269         data = kzalloc(sizeof(*data), GFP_KERNEL);
 270         if (data != NULL) {
 271                 data->msg.rpc_argp = &data->arg;
 272                 data->msg.rpc_resp = &data->res;
 273                 data->res.fh = &data->fh;
 274                 data->res.fattr = &data->fattr;
 275                 data->res.dir_attr = &data->dir_attr;
 276                 nfs_fattr_init(data->res.fattr);
 277                 nfs_fattr_init(data->res.dir_attr);
 278         }
 279         return data;
 280 }
 281
 282 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 283 {
 284         int status;
 285
 286         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 287         nfs_post_op_update_inode(dir, data->res.dir_attr);
 288         if (status == 0)
 289                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
 290         return status;
 291 }
 292
 293 static void nfs3_free_createdata(struct nfs3_createdata *data)
 294 {
 295         kfree(data);
 296 }
 297
 298 /*
 299  * Create a regular file.
 300  * For now, we don't implement O_EXCL.
 301  */
 302 static int
 303 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 304                  int flags, struct nameidata *nd)
 305 {
 306         struct nfs3_createdata *data;
 307         mode_t mode = sattr->ia_mode;
 308         int status = -ENOMEM;
 309
 310         dprintk("NFS call  create %s\n", dentry->d_name.name);
 311
 312         data = nfs3_alloc_createdata();
 313         if (data == NULL)
 314                 goto out;
 315
 316         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 317         data->arg.create.fh = NFS_FH(dir);
 318         data->arg.create.name = dentry->d_name.name;
 319         data->arg.create.len = dentry->d_name.len;
 320         data->arg.create.sattr = sattr;
 321
 322         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 323         if (flags & O_EXCL) {
 324                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 325                 data->arg.create.verifier[0] = jiffies;
 326                 data->arg.create.verifier[1] = current->pid;
 327         }
 328
 329         sattr->ia_mode &= ~current->fs->umask;
 330
 331         for (;;) {
 332                 status = nfs3_do_create(dir, dentry, data);
 333
 334                 if (status != -ENOTSUPP)
 335                         break;
 336                 /* If the server doesn't support the exclusive creation
 337                  * semantics, try again with simple 'guarded' mode. */
 338                 switch (data->arg.create.createmode) {
 339                         case NFS3_CREATE_EXCLUSIVE:
 340                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 341                                 break;
 342
 343                         case NFS3_CREATE_GUARDED:
 344                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 345                                 break;
 346
 347                         case NFS3_CREATE_UNCHECKED:
 348                                 goto out;
 349                 }
 350                 nfs_fattr_init(data->res.dir_attr);
 351                 nfs_fattr_init(data->res.fattr);
 352         }
 353
 354         if (status != 0)
 355                 goto out;
 356
 357         /* When we created the file with exclusive semantics, make
 358          * sure we set the attributes afterwards. */
 359         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 360                 dprintk("NFS call  setattr (post-create)\n");
 361
 362                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 363                         sattr->ia_valid |= ATTR_ATIME;
 364                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 365                         sattr->ia_valid |= ATTR_MTIME;
 366
 367                 /* Note: we could use a guarded setattr here, but I'm
 368                  * not sure this buys us anything (and I'd have
 369                  * to revamp the NFSv3 XDR code) */
 370                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 371                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 372                 dprintk("NFS reply setattr (post-create): %d\n", status);
 373                 if (status != 0)
 374                         goto out;
 375         }
 376         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 377 out:
 378         nfs3_free_createdata(data);
 379         dprintk("NFS reply create: %d\n", status);
 380         return status;
 381 }
 382
 383 static int
 384 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 385 {
 386         struct nfs_removeargs arg = {
 387                 .fh = NFS_FH(dir),
 388                 .name.len = name->len,
 389                 .name.name = name->name,
 390         };
 391         struct nfs_removeres res;
 392         struct rpc_message msg = {
 393                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 394                 .rpc_argp = &arg,
 395                 .rpc_resp = &res,
 396         };
 397         int                     status;
 398
 399         dprintk("NFS call  remove %s\n", name->name);
 400         nfs_fattr_init(&res.dir_attr);
 401         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 402         nfs_post_op_update_inode(dir, &res.dir_attr);
 403         dprintk("NFS reply remove: %d\n", status);
 404         return status;
 405 }
 406
 407 static void
 408 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 409 {
 410         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 411 }
 412
 413 static int
 414 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 415 {
 416         struct nfs_removeres *res;
 417         if (nfs3_async_handle_jukebox(task, dir))
 418                 return 0;
 419         res = task->tk_msg.rpc_resp;
 420         nfs_post_op_update_inode(dir, &res->dir_attr);
 421         return 1;
 422 }
 423
 424 static int
 425 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 426                  struct inode *new_dir, struct qstr *new_name)
 427 {
 428         struct nfs_fattr        old_dir_attr, new_dir_attr;
 429         struct nfs3_renameargs  arg = {
 430                 .fromfh         = NFS_FH(old_dir),
 431                 .fromname       = old_name->name,
 432                 .fromlen        = old_name->len,
 433                 .tofh           = NFS_FH(new_dir),
 434                 .toname         = new_name->name,
 435                 .tolen          = new_name->len
 436         };
 437         struct nfs3_renameres   res = {
 438                 .fromattr       = &old_dir_attr,
 439                 .toattr         = &new_dir_attr
 440         };
 441         struct rpc_message msg = {
 442                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 443                 .rpc_argp       = &arg,
 444                 .rpc_resp       = &res,
 445         };
 446         int                     status;
 447
 448         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 449         nfs_fattr_init(&old_dir_attr);
 450         nfs_fattr_init(&new_dir_attr);
 451         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 452         nfs_post_op_update_inode(old_dir, &old_dir_attr);
 453         nfs_post_op_update_inode(new_dir, &new_dir_attr);
 454         dprintk("NFS reply rename: %d\n", status);
 455         return status;
 456 }
 457
 458 static int
 459 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 460 {
 461         struct nfs_fattr        dir_attr, fattr;
 462         struct nfs3_linkargs    arg = {
 463                 .fromfh         = NFS_FH(inode),
 464                 .tofh           = NFS_FH(dir),
 465                 .toname         = name->name,
 466                 .tolen          = name->len
 467         };
 468         struct nfs3_linkres     res = {
 469                 .dir_attr       = &dir_attr,
 470                 .fattr          = &fattr
 471         };
 472         struct rpc_message msg = {
 473                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 474                 .rpc_argp       = &arg,
 475                 .rpc_resp       = &res,
 476         };
 477         int                     status;
 478
 479         dprintk("NFS call  link %s\n", name->name);
 480         nfs_fattr_init(&dir_attr);
 481         nfs_fattr_init(&fattr);
 482         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 483         nfs_post_op_update_inode(dir, &dir_attr);
 484         nfs_post_op_update_inode(inode, &fattr);
 485         dprintk("NFS reply link: %d\n", status);
 486         return status;
 487 }
 488
 489 static int
 490 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 491                   unsigned int len, struct iattr *sattr)
 492 {
 493         struct nfs3_createdata *data;
 494         int status = -ENOMEM;
 495
 496         if (len > NFS3_MAXPATHLEN)
 497                 return -ENAMETOOLONG;
 498
 499         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 500
 501         data = nfs3_alloc_createdata();
 502         if (data == NULL)
 503                 goto out;
 504         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 505         data->arg.symlink.fromfh = NFS_FH(dir);
 506         data->arg.symlink.fromname = dentry->d_name.name;
 507         data->arg.symlink.fromlen = dentry->d_name.len;
 508         data->arg.symlink.pages = &page;
 509         data->arg.symlink.pathlen = len;
 510         data->arg.symlink.sattr = sattr;
 511
 512         status = nfs3_do_create(dir, dentry, data);
 513
 514         nfs3_free_createdata(data);
 515 out:
 516         dprintk("NFS reply symlink: %d\n", status);
 517         return status;
 518 }
 519
 520 static int
 521 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 522 {
 523         struct nfs3_createdata *data;
 524         int mode = sattr->ia_mode;
 525         int status = -ENOMEM;
 526
 527         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 528
 529         sattr->ia_mode &= ~current->fs->umask;
 530
 531         data = nfs3_alloc_createdata();
 532         if (data == NULL)
 533                 goto out;
 534
 535         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 536         data->arg.mkdir.fh = NFS_FH(dir);
 537         data->arg.mkdir.name = dentry->d_name.name;
 538         data->arg.mkdir.len = dentry->d_name.len;
 539         data->arg.mkdir.sattr = sattr;
 540
 541         status = nfs3_do_create(dir, dentry, data);
 542         if (status != 0)
 543                 goto out;
 544
 545         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 546 out:
 547         nfs3_free_createdata(data);
 548         dprintk("NFS reply mkdir: %d\n", status);
 549         return status;
 550 }
 551
 552 static int
 553 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 554 {
 555         struct nfs_fattr        dir_attr;
 556         struct nfs3_diropargs   arg = {
 557                 .fh             = NFS_FH(dir),
 558                 .name           = name->name,
 559                 .len            = name->len
 560         };
 561         struct rpc_message msg = {
 562                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 563                 .rpc_argp       = &arg,
 564                 .rpc_resp       = &dir_attr,
 565         };
 566         int                     status;
 567
 568         dprintk("NFS call  rmdir %s\n", name->name);
 569         nfs_fattr_init(&dir_attr);
 570         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 571         nfs_post_op_update_inode(dir, &dir_attr);
 572         dprintk("NFS reply rmdir: %d\n", status);
 573         return status;
 574 }
 575
 576 /*
 577  * The READDIR implementation is somewhat hackish - we pass the user buffer
 578  * to the encode function, which installs it in the receive iovec.
 579  * The decode function itself doesn't perform any decoding, it just makes
 580  * sure the reply is syntactically correct.
 581  *
 582  * Also note that this implementation handles both plain readdir and
 583  * readdirplus.
 584  */
 585 static int
 586 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 587                   u64 cookie, struct page *page, unsigned int count, int plus)
 588 {
 589         struct inode            *dir = dentry->d_inode;
 590         struct nfs_fattr        dir_attr;
 591         __be32                  *verf = NFS_COOKIEVERF(dir);
 592         struct nfs3_readdirargs arg = {
 593                 .fh             = NFS_FH(dir),
 594                 .cookie         = cookie,
 595                 .verf           = {verf[0], verf[1]},
 596                 .plus           = plus,
 597                 .count          = count,
 598                 .pages          = &page
 599         };
 600         struct nfs3_readdirres  res = {
 601                 .dir_attr       = &dir_attr,
 602                 .verf           = verf,
 603                 .plus           = plus
 604         };
 605         struct rpc_message      msg = {
 606                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 607                 .rpc_argp       = &arg,
 608                 .rpc_resp       = &res,
 609                 .rpc_cred       = cred
 610         };
 611         int                     status;
 612
 613         if (plus)
 614                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 615
 616         dprintk("NFS call  readdir%s %d\n",
 617                         plus? "plus" : "", (unsigned int) cookie);
 618
 619         nfs_fattr_init(&dir_attr);
 620         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 621
 622         nfs_invalidate_atime(dir);
 623
 624         nfs_refresh_inode(dir, &dir_attr);
 625         dprintk("NFS reply readdir: %d\n", status);
 626         return status;
 627 }
 628
 629 static int
 630 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 631                 dev_t rdev)
 632 {
 633         struct nfs3_createdata *data;
 634         mode_t mode = sattr->ia_mode;
 635         int status = -ENOMEM;
 636
 637         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 638                         MAJOR(rdev), MINOR(rdev));
 639
 640         sattr->ia_mode &= ~current->fs->umask;
 641
 642         data = nfs3_alloc_createdata();
 643         if (data == NULL)
 644                 goto out;
 645
 646         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 647         data->arg.mknod.fh = NFS_FH(dir);
 648         data->arg.mknod.name = dentry->d_name.name;
 649         data->arg.mknod.len = dentry->d_name.len;
 650         data->arg.mknod.sattr = sattr;
 651         data->arg.mknod.rdev = rdev;
 652
 653         switch (sattr->ia_mode & S_IFMT) {
 654         case S_IFBLK:
 655                 data->arg.mknod.type = NF3BLK;
 656                 break;
 657         case S_IFCHR:
 658                 data->arg.mknod.type = NF3CHR;
 659                 break;
 660         case S_IFIFO:
 661                 data->arg.mknod.type = NF3FIFO;
 662                 break;
 663         case S_IFSOCK:
 664                 data->arg.mknod.type = NF3SOCK;
 665                 break;
 666         default:
 667                 status = -EINVAL;
 668                 goto out;
 669         }
 670
 671         status = nfs3_do_create(dir, dentry, data);
 672         if (status != 0)
 673                 goto out;
 674         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 675 out:
 676         nfs3_free_createdata(data);
 677         dprintk("NFS reply mknod: %d\n", status);
 678         return status;
 679 }
 680
 681 static int
 682 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 683                  struct nfs_fsstat *stat)
 684 {
 685         struct rpc_message msg = {
 686                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 687                 .rpc_argp       = fhandle,
 688                 .rpc_resp       = stat,
 689         };
 690         int     status;
 691
 692         dprintk("NFS call  fsstat\n");
 693         nfs_fattr_init(stat->fattr);
 694         status = rpc_call_sync(server->client, &msg, 0);
 695         dprintk("NFS reply statfs: %d\n", status);
 696         return status;
 697 }
 698
 699 static int
 700 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 701                  struct nfs_fsinfo *info)
 702 {
 703         struct rpc_message msg = {
 704                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 705                 .rpc_argp       = fhandle,
 706                 .rpc_resp       = info,
 707         };
 708         int     status;
 709
 710         dprintk("NFS call  fsinfo\n");
 711         nfs_fattr_init(info->fattr);
 712         status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
 713         dprintk("NFS reply fsinfo: %d\n", status);
 714         return status;
 715 }
 716
 717 static int
 718 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 719                    struct nfs_pathconf *info)
 720 {
 721         struct rpc_message msg = {
 722                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 723                 .rpc_argp       = fhandle,
 724                 .rpc_resp       = info,
 725         };
 726         int     status;
 727
 728         dprintk("NFS call  pathconf\n");
 729         nfs_fattr_init(info->fattr);
 730         status = rpc_call_sync(server->client, &msg, 0);
 731         dprintk("NFS reply pathconf: %d\n", status);
 732         return status;
 733 }
 734
 735 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 736 {
 737         if (nfs3_async_handle_jukebox(task, data->inode))
 738                 return -EAGAIN;
 739
 740         nfs_invalidate_atime(data->inode);
 741         nfs_refresh_inode(data->inode, &data->fattr);
 742         return 0;
 743 }
 744
 745 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 746 {
 747         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 748 }
 749
 750 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 751 {
 752         if (nfs3_async_handle_jukebox(task, data->inode))
 753                 return -EAGAIN;
 754         if (task->tk_status >= 0)
 755                 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
 756         return 0;
 757 }
 758
 759 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 760 {
 761         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 762 }
 763
 764 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 765 {
 766         if (nfs3_async_handle_jukebox(task, data->inode))
 767                 return -EAGAIN;
 768         nfs_refresh_inode(data->inode, data->res.fattr);
 769         return 0;
 770 }
 771
 772 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 773 {
 774         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 775 }
 776
 777 static int
 778 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 779 {
 780         struct inode *inode = filp->f_path.dentry->d_inode;
 781
 782         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 783 }
 784
 785 const struct nfs_rpc_ops nfs_v3_clientops = {
 786         .version        = 3,                    /* protocol version */
 787         .dentry_ops     = &nfs_dentry_operations,
 788         .dir_inode_ops  = &nfs3_dir_inode_operations,
 789         .file_inode_ops = &nfs3_file_inode_operations,
 790         .getroot        = nfs3_proc_get_root,
 791         .getattr        = nfs3_proc_getattr,
 792         .setattr        = nfs3_proc_setattr,
 793         .lookup         = nfs3_proc_lookup,
 794         .access         = nfs3_proc_access,
 795         .readlink       = nfs3_proc_readlink,
 796         .create         = nfs3_proc_create,
 797         .remove         = nfs3_proc_remove,
 798         .unlink_setup   = nfs3_proc_unlink_setup,
 799         .unlink_done    = nfs3_proc_unlink_done,
 800         .rename         = nfs3_proc_rename,
 801         .link           = nfs3_proc_link,
 802         .symlink        = nfs3_proc_symlink,
 803         .mkdir          = nfs3_proc_mkdir,
 804         .rmdir          = nfs3_proc_rmdir,
 805         .readdir        = nfs3_proc_readdir,
 806         .mknod          = nfs3_proc_mknod,
 807         .statfs         = nfs3_proc_statfs,
 808         .fsinfo         = nfs3_proc_fsinfo,
 809         .pathconf       = nfs3_proc_pathconf,
 810         .decode_dirent  = nfs3_decode_dirent,
 811         .read_setup     = nfs3_proc_read_setup,
 812         .read_done      = nfs3_read_done,
 813         .write_setup    = nfs3_proc_write_setup,
 814         .write_done     = nfs3_write_done,
 815         .commit_setup   = nfs3_proc_commit_setup,
 816         .commit_done    = nfs3_commit_done,
 817         .file_open      = nfs_open,
 818         .file_release   = nfs_release,
 819         .lock           = nfs3_proc_lock,
 820         .clear_acl_cache = nfs3_forget_cached_acls,
 821 };